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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Erin,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Depends on your building size, system type/size, orientation,
shading, outdoor conditions, etc….Are you looking at overall $cost
or therms or kWh saved. Is it 30 WWR out of 50k sf or 200k sf bld?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>U value will impact heating and cooling and other things in
lesser value, but if it’s heating only/no cooling-will be more drastic
difference.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You can check Epro support to see how the SHGC is calculated in
the software: <a href="mailto:support@energysoft.com">support@energysoft.com</a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>-Just curious, Did Oregon adopted Epro as it’s own
code compliant approved software? How do you get your baseline?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Nikola<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Erin Rowe<br>
<b>Sent:</b> Tuesday, October 20, 2009 5:16 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] Old SHGC<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi All,</span>
<o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I've been
looking through a model in EnergyPro that has a SHGC</span><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>c</span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> of 0.99 entered into
the baseline model, because the existing office baseline building is old
single-pane 1/8" glazing (window:wall ratio is about 30%). However, a more
reasonable assumption here, based on the non-residential Oregon code compliance
manual would be SHGC</span><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>c</span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> =0.86. The
issue I'm having is that I can't re-run the model so I have no way of telling
how this might impact energy use. My hunch is that this difference in
SHGC would have mimimal affect on the energy consumption. Any
thoughts? </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I've also
been told that while the EnergyPro input for glazing characteristics is SHGC,
EnergyPro actually treats this input as a Shading Coefficient in the
calculations. So, if this is the case then an input of 0.99 shading
coefficient would actually calculate to be a SHGC of 0.86, and would be the correct
input. Does anyone know if this is true?</span><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I'd
appreciate any feedback you have.</span> <o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks,</span>
<br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Erin</span> <o:p></o:p></p>
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<br>
<br>
<o:p></o:p></p>
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